The "Pusa Komal" variety of cowpea, which was developed by hybridization and selection, is primarily resistant to which of the following?

Which one of the following agents is used to induce mutation in higher plants?

Consider the following four statements $(a-d)$ regarding the successful cultivation of chickpea in an area where bacterial blight is common:
$(a)$ Spraying of Bordeaux mixture.
$(b)$ Control of the disease vector.
$(c)$ Use of disease-free seeds.
$(d)$ Use of disease-resistant varieties.
Which of the above are the most effective strategies for managing this disease?

Select the mismatched pair with respect to mutated varieties of crops.

Suggest some of the features of plants that will prevent insect and pest infestation.

Triticale is obtained by crossing wheat with: